Transgender
To dream of transgender people, or people with both make and female sexual organs represents aspects of your personality that share both masculine and feminine traits. Something powerful and impotent or beautiful and insensitive.
For example, if a man dreams of a woman he sexually desires having a penis it may symbolize his desire for that woman being very powerful over this decisions. Something that may allow that person in real life to control him.
Transsexuals may also represent your anxieties, uncertainties, or discomfort about masculine/feminine roles or passive/aggressive behavior.